import java.util.HashMap;
import java.util.TreeMap;

@SuppressWarnings("all")
public class Main  {
    public static void main(String[] args) {
        HashMap map = new HashMap();
        A a = new A();
        for (int i = 0; i < 10; i++) {
            map.put(new A(),i+"");
        }
        
        


    }
}

class A{

}

interface B{
    int n = 100;

}
